Demo entry 3549426

/* This is valid C++ */automain()->decltype('O.o')try<%[O_O=0b0]<%https://gha.st/a-tour-of-rare-cpp-features/typedefstructoO;o*(*((&&o(o*o))&lt;:'o':&gt;))(o*o);if(O*O=decltype(0'0[o(0)](0))(0))1,000.00;elsereturn0==O==0?throwO_O:O_O;%>();%>catch(...){throw;}